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A118556
Lucky numbers for which the product of the digits is also a lucky number.
1
1, 3, 7, 9, 13, 31, 33, 37, 73, 79, 111, 133, 135, 171, 331, 357, 535, 537, 553, 717, 735, 739, 937, 1117, 1155, 1179, 1197, 1357, 1395, 1711, 1731, 1771, 3111, 3171, 3175, 3571, 3915, 3951, 3999, 5137, 5139, 5151, 5371, 5377, 5713, 5737, 5913, 5997, 7111
OFFSET
1,2
LINKS
EXAMPLE
79 is in the sequence because (1) it is a lucky number and (2) the product of its digits 7*9=63 is also a lucky number.
CROSSREFS
Sequence in context: A032664 A166733 A172987 * A279617 A199919 A346303
KEYWORD
base,nonn
AUTHOR
Luc Stevens (lms022(AT)yahoo.com), May 07 2006
STATUS
approved